Production of semi-reflecting glass products

Abstract

This invention relates to the process of producing semi-reflecting glass products comprising applying to at least a portion of one surface of said product a solution of at least one charge-transfer complex in a non-aqueous organic solvent therefor, said product having been heated prior to said application to a temperature sufficient to evaporate said solvent and cause pyrolysis of said charge-transfer complex, and said charge-transfer complex having the general formula MeX m Y n where Me is a transition element having metallic characteristics, X is at least one beta-diketone ester or alcohol radical having no more than 10 carbon atoms or at least one halogen radical, Y is at least one beta-diketone radical having no more than 10 carbon atoms and differing from X, and m and n equal the valence of Me.

What is claimed is: 
     
       1. The process of producing semi-reflecting glass products by forming a metal oxide coating thereon comprising applying to at least a portion of one surface of said product a solution of at least one charge-transfer complex in a non-aqueous organic solvent therefor, said product having been heated prior to said application to a temperature sufficient to evaporate said solvent and cause pyrolysis of said charge-transfer complex, and said charge-transfer complex having the general formula MeX m  Y n  where Me is a polyvalent heavy metal or metalloid, X is at least one beta-diketone radical having no more than 10 carbon atoms, Y is at least one beta-diketone radical having no more than 10 carbon atoms and differing from X; or one of X or Y can be at least one halogen radical, and m and n equal the valence of Me. 
     
     
       2. The process of claim 1 wherein the glass product is a window, X is at least one acetylacetone radical, and Y is at least one C 6  to C 10  beta-diketone radical. 
     
     
       3. The process according to claim 2 wherein the beta-diketone radical is the isovaleroylacetone radical. 
     
     
       4. A process according to claim 3 wherein the metal is trivalent and the radicals comprise an acetylacetone radical and two isovaleroylacetone radicals. 
     
     
       5. A process according to claim 3 wherein the metal is trivalent and the radicals comprise two acetylacetone radicals and an isovaleroylacetone radical. 
     
     
       6. The process according to claim 3 wherein the metal is trivalent and the radicals comprise 1.5 acetylacetone radicals and 1.5 isovaleroylacetone radicals. 
     
     
       7. The process according to claim 1 wherein a mixture of at least two different said complexes is used in solution in a solvent in which each complex, individually, shows little solubility. 
     
     
       8. The process according to claim 1 wherein the metal is chosen in the group comprising titanium, chromium, iron, and cobalt. 
     
     
       9. The process of claim 7 in which two complexes are used, one chromium and the other iron, and the solvent is ethyl acetate. 
     
     
       10. The process of claim 1 wherein the solvent is ethyl acetate. 
     
     
       11. The process of producing semi-reflecting glass products by forming thereon a coating of at least an oxide of a transition element, comprising applying to at least a portion of one surface of said product a solution of at least one charge transfer complex of said element in a non aqueous solvent therefor, said product having been heated prior to said application to a temperature sufficient to evaporate said solvent and cause pyrolysis of said charge transfer complex and said charge transfer complex having the general formula Me X m  Y n , where Me is said transition element, X is a β-diketone, ester or alcohol radical having no more than 10 carbon atoms, Y is a β-diketone, ester or alcohol radical having no more than 10 carbon atoms and differing from X or a halogen radical.